Building codes are intended to protect the health, safety, and welfare of homeowners and residents by establishing minimum construction standards. Read a Primer on Building Codes. Building codes also provide uniformity in the construction industry. Building codes embrace all aspects of construction. They set minimum standards for materials, structural elements, fire prevention, plumbing and sanitation, radon reduction, and the electrical and mechanical systems in a home. Building codes are adopted by a legislative body, then enacted to regulate building construction within a particular jurisdiction, such as a township, city, county, or state. Read how your municipality, county, or state can choose to adopt a code (or standard) that covers radon-resistant new construction, authored by one of several organizations. Learn
more about code adoption.

To the best of EPA’s knowledge, the list of jurisdictions by state represents the state and local codes that require the use of radon resistant construction techniques in new homes. Note: These codes were in force in the jurisdictions named as of February, 2009. Links to state web sites, policies and codes are provided as were available at the time of the data collection, we intend to update this information periodically (last updated on November 18, 2013). If you have information about regulations in your state or your jurisdiction that relate to radon resistant new construction techniques that are not on this list, or if you believe that this list contains inaccurate information, please write to us at rrnc@epa.gov.

California

State Department of Health has the authority to adopt E PA RRNC standards unless the Department of Housing and Community Development adopts standards, in which case only the latter standards may be adopted; California Health and Safety Code — Section 105430 (a)
www.cal-iaq.org/IAQCode.htm

Adopted IRC Appendix F
with local amendment in 2005 and extended RRNC requirements to
multi-family dwellings in 2008. All new single and multi-family
dwellings must include a passive system. See Fort Collins Municipal
Code section 5-30 (102) for single-family and section 5-27 (45) for
multi-family requirements. Commercial dwellings comply with 2006
International Building Code radon standards.
www.colocode.com/ftcollins/municipal/chapter5.htm

Effective November, 17, 1997, East Moline, Illinois, adopted a radon-resistance provision into its building code to control radon levels in new construction of one- and two-family dwellings and other new residential buildings three stories or less in height. East Moline is located in a Zone 1-high radon potential area. To promote the regulation, East Moline offers a Zone 1 Credit that allows for $150 to be discounted from the building permit fee.
www.healthpolicyguide.org/doc.asp?id=5972

Maine

State of Maine

If a municipality determines that a radon code or standard for new residential construction must be adopted by that municipality, that municipality must adopt a radon code or standard recommended by the American Society for Testing and Materials or a successor organization. Currently, this code is ASTM 1465.
Maine RRNC Codes

Ordinance enacted on July 26, 2005 to adopt 2003 IRC including Appendix F, Radon Control Measures. Guidance for RRNC for Zone 1 designation as determined by locally available data or Figure AF101 (EPA Radon Zone Map), but not mandatory in county.
Washington County RRNC Codes

City of Rockville

In 1995, Rockville, Md., adopted and amended its one- and two-family dwelling code. This regulation requires radon mitigation in newly constructed detached and semi-detached single-family dwellings and townhouses (single family dwellings attached side to side). The requirement also includes basement and ground floor additions to existing dwellings, as well as conversions of grade-slab garages, carports, porches, etc. to living space.
www.healthpolicyguide.org/doc.asp?id=5972

Michigan State Housing Development Authority (MSHDA) MSHDA requires a site-specific environmental screening for all development proposals being considered for financing, which includes RRNC in Zone 1 areas.
Michigan RRNC Codes

Minnesota

State of Minnesota

Effective August 2007, the commissioner of labor and industry shall adopt rules for radon control as part of the State Building Code for all new residential buildings.

These rules shall incorporate the radon control methods found in the IRC Appendix F as the model language, with necessary amendments to coordinate with the other adopted construction codes in Minnesota. Minnesota RRNC Codes

New Jersey

State of New Jersey

New Jersey Department of Environmental Protection (DEP) N.J.A.C. 5:23-10 requires that all buildings of use Group E and R as defined by the building
sub code must be built using RRNC if they are in Tier 1 municipalities as listed in the
sub code.

26:2D-80 -- The Department of Community Affairs is authorized to enter into an agreement with a public or private agency to carry out testing for radon gas and radon progeny at the sites of residential dwellings, the construction of which is in progress or commences on or after the effective date of this act, and to provide funding for that testing, provided that each $1.00 of that funding is matched by $1.00 from other public or private sources.
NJ Radon Hazard Subcodes (PDF)www.njradon.org

Oregon

In addition, we have adopted a new section 1812 in the Oregon Structural Specialty Code (OSSC) using Appendix F as a model. The OSSC is based on the 2009 IBC.
This was done at the direction of the Oregon legislature for listed counties and specific to R-3 and R-2 residential occupancies with an effective date of April 1, 2011. Radon mitigation measures are also required for all new public buildings effective April 1, 2013. The legislature directed the Building Codes Division to adopt these standards as of January 1, 2011. Link to the backgrounder and code sections adopted -
www.bcd.oregon.gov/notices/Adopted_Rules/2011/010111_Radon_pr.pdf

Virginia

Authorizes state to promulgate a Uniform State-wide Building Code. Enforces the radon-resistant new construction provision; Virginia Code Ann. § 36- 98. The 2003 Edition of the Virginia Construction Code (effective 11/16/05) requires group R-3 and R-4 structures to meet requirements of Appendix F of IRC
Virginia State RRNC Codes (PDF)

State of Virginia - 2000 Uniform Building Code

R329.1. General. Following official action under Article 7 (§ 15.2-2280 et seq.) of Chapter 22 of Title 15.2 of the Code of Virginia by a locality in areas of high radon potential, as indicated by Zone 1 on the U.S. EPA Map of Radon Zones (IRC Figure AF101), such locality shall enforce the provisions contained in Appendix F. Exemption: Buildings or portions thereof with crawl space foundations which are ventilated to the exterior, shall not be required to provide radon-resistant construction.
www.dhcd.virginia.gov/BFR/PDFs (PDF)

Rockbridge County

Amended the Land Development Regulations, Section 802, Zoning and Building Permit Procedures, to add 802.02-3 (g) Radon Resistant Construction, as a provision for all new one and two family dwellings constructed in the County, in accordance with R329.1 of the Uniform Statewide Building Code, October 25, 2004.